1-iodoundecane

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Ethyl 2-(n-undecyl)-acetoacetate was prepared from undecyl iodide (26.6 .g) by reaction with an equivalent amount of the sodium derivative of ethyl acetoacetate in ethanol (5 hours, reflux temperature). After cooling the solvent is removed on a rotary evaporator, 300 ml of hexane is added to the residue, and the precipitate of salt is now easily filtered. The product is of sufficient purity (g.c-m.s.) to dispense with further work-up. Reaction of it (6.80 g) with 3.5-difluoroaniline (3.1 g) and 0.30 g of p-toluenesulfonic acid monohydrate in 100 ml of benzene (water separator, 3 days) produced the anilinocrotonic ester with very little of the starting materials left. After removal of the solvent, the crude product was added quickly to 30 ml of boiling Dowtherm A and kept at boiling temperature for about 10 minutes. The product crystallizes out upon cooling and is isolated by filtration and washing with hexane (50 ml). After cooling the solvent is removed on a rotary evaporator, 300 ml of hexane is added to the residue the precipitate of salt is now easily filtered Reaction of it (6.80 g) with 3.5-difluoroaniline (3.1 g) and 0.30 g of p-toluenesulfonic acid monohydrate in 100 ml of benzene (water separator, 3 days)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of cis-1-methyl-2,3,3a,4,5,9b-hexahydro-1H-pyrrolo[3,2-h]isoquinoline (120 mg, 0.64 mmol) in AcOH (2 ml) was added 1-iodoundecane (569 mg, 1.92 mmol). The mixture was heated at reflux under nitrogen for 3 days. AcOH was evaporated and the residue was dissolved in CHCl3. The mixture was washed with saturated aqueous NaHCO3, water and brine successively and dried. Evaporation of the solvent followed by titration with ether afforded 205 mg (66%) of cis-8-dodecyl-1-methyl-2,3,3a,4,5,9b-hexahydro-1H-pyrrolo[3,2-h]isoquinolin-8-ium iodide (ACDD) as a brown oil. 1H NMR (300 MHz, CDCl3) δ9.08 (1H, s, C9-H), 9.02 (1H, d, J6.3 Hz, C7-H), 7.79 (1H, d, J6.3 Hz, C6-H), 4.90 (2H, m. pyCH2), 3.48 (1H, d, J8.4 Hz, C9b-H), 2.36 (3H, s, NCH3), 1.50-3.10 (9H, m, CH2+CH), 2.00 (2H, m, pyCH2CH2), 1.10-1.40 (18H, m, 9×CH2), 0.85 (3H, t, J6.9 Hz, CH2CH3); 13C NMR (75 MHz, CDCl3) δ161.5, 143.3, 142.5, 138.8, 127.5, 63.1, 61.0, 55.7, 41.0, 35.6, 32.0, 31.9, 30.0, 29.6×2, 29.5, 29.4, 29.3, 29.1, 28.1, 27.3, 26.0, 22.7, 14.1. The mixture was heated at reflux under nitrogen for 3 days AcOH was evaporated the residue was dissolved in CHCl3 The mixture was washed with saturated aqueous NaHCO3, water and brine successively dried Evaporation of the solvent

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of cis-1-methyl-2,3,3a,4,5,9b-hexahydro-1H-pyrrolo[3,2-h]isoquinoline (120 mg, 0.64 mmol) in AcOH (2 ml) was added 1-iodoundecane (542 mg, 1.92 mmol). The mixture was heated at reflux under nitrogen for 3 days. AcOH was evaporated and the residue was dissolved in CHCl3. The mixture was washed with saturated aqueous NaHCO3, water and brine successively and dried. Evaporation of the solvent followed by titration with ether afforded 210 mg (70%) of cis-1-methyl-8-undecyl-2,3,3a,4,5,9b-hexahydro-1H-pyrrolo[3,2-h]isoquinolin-8-ium iodide (ACU) as a brown oil. 1H NMR (300 MHz, CDCl3) δ9.16 (1H, s, C9-H), 9.07 (1H, d, J6.0 Hz, C7-H), 7.81 (1H, d, J6.0 Hz, C6-H), 4.82 (2H, m. pyCH2), 3.44 (1H, d, J8.4 Hz, C9b-H), 2.29 (3H, s, NCH3), 1.50-3.10 (9H, m, CH2+CH), 1.95 (2H, m, pyCH2CH2), 1.00-1.40 (16H, m, 8×CH2), 0.76 (3H, t, J6.9 Hz, CH2CH3); 13C NMR (75 MHz, CDCl3) δ161.5, 143.2, 142.4, 138.8, 127.5, 63.1, 61.0, 55.7, 41.0, 35.6, 32.0, 31.8, 30.0, 29.51, 29.48, 29.4, 29.2, 29.1, 28.1, 27.3, 26.0, 22.6, 14.1. The mixture was heated at reflux under nitrogen for 3 days AcOH was evaporated the residue was dissolved in CHCl3 The mixture was washed with saturated aqueous NaHCO3, water and brine successively dried Evaporation of the solvent

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Ethyl 2-(n-undecyl)-acetoacetate was prepared from undecyl iodide (26.6.g) by reaction with an equivalent amount of the sodium derivative of ethyl acetoacetate in ethanol (5 hours, reflux temperature). After cooling the solvent is removed on a rotary evaporator, 300 ml of hexane is added to the residue, and the precipitate of salt is now easily filtered. The product is of sufficient purity (g.c-m.s.) to dispense with further work-up.Reaction of it (6.80 g) with 3,5-difluoroaniline (3.1 g) and 0.30 g of p-toluenesulfonic acid monohydrate in 100 ml of benzene (water separator, 3 days) produced the anilinocrotonic ester with very little of the starting materials left. After removal of the solvent, the crude product was added quickly to 30 ml of boiling Dowtherm A and kept at boiling temperature for about 10 minutes. The product crystallizes out upon cooling and is isolated by filtration and washing with hexane (50 ml). After cooling the solvent is removed on a rotary evaporator, 300 ml of hexane is added to the residue the precipitate of salt is now easily filtered to dispense with further work-up.Reaction of it (6.80 g) with 3,5-difluoroaniline (3.1 g) and 0.30 g of p-toluenesulfonic acid monohydrate in 100 ml of benzene (water separator, 3 days)